Sunny Optical Technology (Group) Company Limited (OTCMKTS:SNPTF – Get Rating) saw a significant growth in short interest in May. As of May 15th, there was short interest totalling 343,800 shares, a growth of 46.2% from the April 30th total of 235,200 shares. Based on an average daily volume of 2,000 shares, the days-to-cover ratio is […]